1. Which NYC code regulates the installation of gas piping systems?
A) NYC Building Code
B) NYC Fuel Gas Code
C) NYC Plumbing Code
D) NYC Mechanical Code
Answer: B) NYC Fuel Gas Code
Explanation: The NYC Fuel Gas Code specifically governs the installation,
alteration, and inspection of gas piping systems within New York City.
2. What is the minimum clearance required between a gas meter and an
ignition source?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Answer: D) 24 inches
Explanation: NYC Fuel Gas Code requires gas meters to be located at least 24
inches away from potential ignition sources to prevent fire hazards.
3. Which type of pipe is generally NOT approved for natural gas service in
NYC?
A) Black steel
B) Copper
C) PVC
D) CSST
Answer: C) PVC
Explanation: PVC is not suitable for natural gas because it cannot withstand
gas pressures and is not fire-resistant.
,4. What is the maximum allowable operating pressure for residential
natural gas piping in NYC?
A) 0.25 psi
B) 2 psi
C) 5 psi
D) 10 psi
Answer: A) 0.25 psi
Explanation: Residential gas systems are low-pressure systems, typically not
exceeding 0.25 psi, to ensure safe distribution.
5. How often must a gas piping system be tested for leaks after installation?
A) Only once
B) Before first use
C) Monthly
D) Annually
Answer: B) Before first use
Explanation: NYC Fuel Gas Code requires that all new or altered gas piping be
tested for leaks (usually with air or inert gas) before being put into service.
6. Which fitting is commonly used to change the direction of a black steel
gas pipe?
A) Union
B) Elbow
C) Tee
D) Cap
Answer: B) Elbow
Explanation: Elbows are used to change the direction of piping. Unions join
sections, tees branch the line, and caps close off the end.
7. CSST piping must be properly bonded and grounded to prevent:
A) Gas leaks
B) Lightning damage
C) Corrosion
D) Freezing
,Answer: B) Lightning damage
Explanation: Corrugated Stainless Steel Tubing (CSST) can be punctured by
lightning-induced surges if not properly bonded and grounded.
8. When installing a gas meter indoors, what ventilation requirement must
be met?
A) No ventilation required
B) 1 square foot per 1000 BTU/hr
C) Continuous mechanical exhaust
D) Direct vent to outside only
Answer: B) 1 square foot per 1000 BTU/hr
Explanation: NYC code requires proper ventilation in meter rooms to prevent
accumulation of leaked gas, typically calculated based on the meter's BTU
capacity.
9. A union fitting is primarily used to:
A) Change pipe direction
B) Connect flexible tubing
C) Allow future disassembly
D) Reduce pipe diameter
Answer: C) Allow future disassembly
Explanation: A union allows two sections of pipe to be disconnected without
cutting, which is important for maintenance or repair.
10. What is the purpose of a drip leg (sediment trap) in a gas line?
A) Increase gas pressure
B) Remove moisture and debris
C) Reduce gas flow noise
D) Measure gas consumption
Answer: B) Remove moisture and debris
Explanation: A drip leg or sediment trap collects dirt and condensate,
preventing damage to appliances like furnaces or boilers.
11. How far must underground gas piping be buried in NYC?
A) 6 inches
, B) 12 inches
C) 18 inches
D) 24 inches
Answer: D) 24 inches
Explanation: NYC Fuel Gas Code mandates at least 24 inches of cover for
underground gas piping to protect against accidental damage.
12. What is the maximum length of a CSST run without support?
A) 3 feet
B) 5 feet
C) 8 feet
D) 10 feet
Answer: B) 5 feet
Explanation: CSST must be supported at intervals not exceeding 5 feet to
prevent sagging and mechanical damage.
13. Which of the following is a recognized method for leak detection in gas
piping?
A) Soap solution
B) Smelling salts
C) UV light
D) Pressure cooker test
Answer: A) Soap solution
Explanation: A soapy water solution applied to joints will form bubbles if gas
is leaking. This is standard practice for low-pressure gas systems.
14. What type of regulator is required for appliances with higher BTU
ratings?
A) Low-pressure regulator
B) High-pressure regulator
C) Relief valve
D) Check valve
Answer: B) High-pressure regulator
Explanation: Appliances requiring higher pressures need regulators that can
step down supply pressure safely without limiting flow.
A) NYC Building Code
B) NYC Fuel Gas Code
C) NYC Plumbing Code
D) NYC Mechanical Code
Answer: B) NYC Fuel Gas Code
Explanation: The NYC Fuel Gas Code specifically governs the installation,
alteration, and inspection of gas piping systems within New York City.
2. What is the minimum clearance required between a gas meter and an
ignition source?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Answer: D) 24 inches
Explanation: NYC Fuel Gas Code requires gas meters to be located at least 24
inches away from potential ignition sources to prevent fire hazards.
3. Which type of pipe is generally NOT approved for natural gas service in
NYC?
A) Black steel
B) Copper
C) PVC
D) CSST
Answer: C) PVC
Explanation: PVC is not suitable for natural gas because it cannot withstand
gas pressures and is not fire-resistant.
,4. What is the maximum allowable operating pressure for residential
natural gas piping in NYC?
A) 0.25 psi
B) 2 psi
C) 5 psi
D) 10 psi
Answer: A) 0.25 psi
Explanation: Residential gas systems are low-pressure systems, typically not
exceeding 0.25 psi, to ensure safe distribution.
5. How often must a gas piping system be tested for leaks after installation?
A) Only once
B) Before first use
C) Monthly
D) Annually
Answer: B) Before first use
Explanation: NYC Fuel Gas Code requires that all new or altered gas piping be
tested for leaks (usually with air or inert gas) before being put into service.
6. Which fitting is commonly used to change the direction of a black steel
gas pipe?
A) Union
B) Elbow
C) Tee
D) Cap
Answer: B) Elbow
Explanation: Elbows are used to change the direction of piping. Unions join
sections, tees branch the line, and caps close off the end.
7. CSST piping must be properly bonded and grounded to prevent:
A) Gas leaks
B) Lightning damage
C) Corrosion
D) Freezing
,Answer: B) Lightning damage
Explanation: Corrugated Stainless Steel Tubing (CSST) can be punctured by
lightning-induced surges if not properly bonded and grounded.
8. When installing a gas meter indoors, what ventilation requirement must
be met?
A) No ventilation required
B) 1 square foot per 1000 BTU/hr
C) Continuous mechanical exhaust
D) Direct vent to outside only
Answer: B) 1 square foot per 1000 BTU/hr
Explanation: NYC code requires proper ventilation in meter rooms to prevent
accumulation of leaked gas, typically calculated based on the meter's BTU
capacity.
9. A union fitting is primarily used to:
A) Change pipe direction
B) Connect flexible tubing
C) Allow future disassembly
D) Reduce pipe diameter
Answer: C) Allow future disassembly
Explanation: A union allows two sections of pipe to be disconnected without
cutting, which is important for maintenance or repair.
10. What is the purpose of a drip leg (sediment trap) in a gas line?
A) Increase gas pressure
B) Remove moisture and debris
C) Reduce gas flow noise
D) Measure gas consumption
Answer: B) Remove moisture and debris
Explanation: A drip leg or sediment trap collects dirt and condensate,
preventing damage to appliances like furnaces or boilers.
11. How far must underground gas piping be buried in NYC?
A) 6 inches
, B) 12 inches
C) 18 inches
D) 24 inches
Answer: D) 24 inches
Explanation: NYC Fuel Gas Code mandates at least 24 inches of cover for
underground gas piping to protect against accidental damage.
12. What is the maximum length of a CSST run without support?
A) 3 feet
B) 5 feet
C) 8 feet
D) 10 feet
Answer: B) 5 feet
Explanation: CSST must be supported at intervals not exceeding 5 feet to
prevent sagging and mechanical damage.
13. Which of the following is a recognized method for leak detection in gas
piping?
A) Soap solution
B) Smelling salts
C) UV light
D) Pressure cooker test
Answer: A) Soap solution
Explanation: A soapy water solution applied to joints will form bubbles if gas
is leaking. This is standard practice for low-pressure gas systems.
14. What type of regulator is required for appliances with higher BTU
ratings?
A) Low-pressure regulator
B) High-pressure regulator
C) Relief valve
D) Check valve
Answer: B) High-pressure regulator
Explanation: Appliances requiring higher pressures need regulators that can
step down supply pressure safely without limiting flow.
